The Hidden Valley mine is located in Morobe Province, Papua New Guinea, around 300km north-west of Port Moresby, and is part of the 50:50 joint venture between Harmony and Newcrest Mining Limited. The mine, which has a significant gold and silver reserve, was commissioned during the year and had its first gold pour in June 2009. Ore mined was stockpiled ahead of the full commissioning of the carbon-in-leach gold and silver processing plant in FY10. The plant treats 4.6 million tonnes of ore per year and the Hidden Valley Mine will produce on average +250,000 ounces of gold per year and 4 million ounces of silver per year.

With ninety years of practical instrument know how, KROHNE provides extensive application experience in minerals processing facilities. Experience complimented by our range of OPTIFLUX electromagnetic, OPTIMASS coriolis, OPTISWIRL vortex, ultrasonic and all metal variable area flow meters, KROHNE has unique expertise when it comes to flow measurement. Our range of OPTIWAVE, OPTIFLEX and OPTISOUND continuous level technologies are characterized by their high accuracy and reliability, even in difficult slurry, frothing and solids applications. A complete series of OPTISWITCH point level switches for slurries, liquids and solids round out the KROHNE level portfolio for minerals processing facilities.

About KROHNE: KROHNE provides complete solutions in the field of process measuring technology for flow, mass flow, level, pressure, temperature as well as analysis tasks. Founded in 1921 in Duisburg, Germany, KROHNE employs over 2,200 people worldwide with representatives on all continents. KROHNE stands for innovation and superior product quality and is one of the market leaders in industrial process measurement.